Sail for marine vessels.



Patented May 20, 1902.-

B. LUNDHUIST.

SAIL FUR MARINE VESSELS. Application filed m 24, 1901.

(No Model.)

I WITNESSES (MENTOR I I Zj'fk/m/Z/ lam/7141's! ATTO s UNITED STATES- RICHARD LUNDQUIST, OF LAGUNA DE TERMINOS, MEXICO.

PATENT -OFFlCEjj SAIL FOR MARINE VESSELS.

SPECIFICATION forming part of Letters Patent No. 700,520, dated May 20, 1902.

Application filedJnly 24, 1901. Serial No. 69,493- (No model.) I

To all whom it may concern:

Be it known that I, RICHARD LUNDQUIST, a subject of the King of Sweden and Norway, and a resident of Laguna de Terminos, State of Oampeche, Mexico, have invented a new and Improved Sail for MarineVessels, of which the followingis a full, clear, and exact description.

' This invention relates to a new form of boom and gaif sail by which the efficiency of the sail when hauled on the wind is increased.

This specification is a specific description of one form of the invention, while the claims are definitions of the-actual scope thereof.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in both views.

Figure 1 represents the sail plan of a sloop or cutter to which myinvention is applied,

and Fig. 2 is an enlarged detail view of the same.

a indicates the mast, b the boom, and c the gaff. The mainsail is formed of two parts d and e. The part (1 is permanently laced to the gaff and to the boom and is hooked on the mast at the luff of the sail'in the usual mannor, the head of said part at being square. The part c is jib-headed and is laced to the part d, as indicated at f. The head of the part c is fastened to the peak of the gaff. The foot of the part c is laced to an auxiliary boom g, which is. pivoted on the boom 19 at the point g and which has a sheet-tackle 9 extending between it and the end of them ain boom b. I

1) indicates the sheet tackleof the main boom, which tackle extends to-the traveler on the stern of the vessel, as usual. sired, the clue of the part e of the mainsail may be fastened by a line 6, rove through a cheek-blocks onthe-end of the auxiliary boom g. This arrangement avoids lacing the outer part or clue of the sail e and enables this part of the sail to be'hauled inboard, as may be desired.

-In using the invention, assuming that the vessel is going large, the booms g and b are nary fore-and-aft sail.

If de trimmed so as to extend in a line with each other, thus disposing the parts at and e of the mainsail in the same manner as in the ordi- Whe'n, however, the vessel is hauled on the wind, the sheet-tackle should be slacked away, thus permitting the part e of the mainsail to slack off to leeward and lie in the wind. The part at of the mainsail then is the only active part. The advan tage of this arrangement is due to the follow I ing-mentioned conditions. I have found by practical experience that when a boom and gaff sail is hauled on the wind the part of the sail near the mast and the head of the sail along the gaff are the only parts which actu ally exercise a propelling effect on the vessel.

The other parts merely lie across the course of the wind and tend to heel or tilt the vessel over. Therefore by slacking away the, part c of the sail I avoid'this tiltingeffect, and I enable the vessel to carry her full mainsail longer than otherwise, thus getting more pro- 'ed on the main boom, to which auxiliary boom the foot of the said other sail part is fastened. 2. The combination of a boom, an auxiliary boom arranged to swing thereon, means for independently trimming said booms, and a sari formed in two parts respectively connected with the said booms.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses. I

RICHARD LUNDQU-IST. Witnesses: j

I. B. OWENS, J NO. M. BITTER. 

